Research on Stability of Overburden Structure around Longwall Mining Face in Steeply Dipping Seam Group

Shi Guang Ren; Yong Ping Wu; Jian Hui Yin

doi:10.4028/www.scientific.net/AMM.724.100

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 724Research on Stability of Overburden Structure...

Research on Stability of Overburden Structure around Longwall Mining Face in Steeply Dipping Seam Group

Abstract:

The steeply dipping seam group is defined by the two or more coal seams ,a pitch between 35°~55°. Using masonry beam theory, longitudinal bending theory and “R-S-F” dynamics control theory built a lower area overburden structure mode. Analysed the stability of low position coal seam. The balance requirement and the strength of the structure which is affected by the caving rock and lower coal roof were given. It easily generates two lower position steps rock structure in inclination along working face. Regular breaking of the second structure is the main reason leads to the imbalance of the structure between upper coal pillar and upper coal mining face.The interaction among multiple coal seam panels and overburden structures is the main reason that causes the rock disaster, the unbalance of the lower area may lead to pushing accident, the imbalance of the upper area can generate shock pressure.

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Periodical:

Applied Mechanics and Materials (Volume 724)

Pages:

100-110

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.724.100

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Cite this paper

Online since:

January 2015

Authors:

Shi Guang Ren, Yong Ping Wu, Jian Hui Yin

Keywords:

Disaster Mechanism, Longwall Mining, Overburden Structure, Stability Mechanism, Steeply Dipping Seam Group

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